| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 1998-2015, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * |
| * File ucbuf.c |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 05/10/01 Ram Creation. |
| * |
| * This API reads in files and returns UChars |
| ******************************************************************************* |
| */ |
| |
| #include "unicode/ucnv.h" |
| #include "filestrm.h" |
| |
| #if !UCONFIG_NO_CONVERSION |
| |
| #ifndef UCBUF_H |
| #define UCBUF_H 1 |
| |
| typedef struct UCHARBUF UCHARBUF; |
| /** |
| * End of file value |
| */ |
| #define U_EOF 0xFFFFFFFF |
| /** |
| * Error value if a sequence cannot be unescaped |
| */ |
| #define U_ERR 0xFFFFFFFE |
| |
| typedef struct ULine ULine; |
| |
| struct ULine { |
| UChar *name; |
| int32_t len; |
| }; |
| |
| /** |
| * Opens the UCHARBUF with the given file stream and code page for conversion |
| * @param fileName Name of the file to open. |
| * @param codepage The encoding of the file stream to convert to Unicode. |
| * If *codepoge is NULL on input the API will try to autodetect |
| * popular Unicode encodings |
| * @param showWarning Flag to print out warnings to STDOUT |
| * @param buffered If TRUE performs a buffered read of the input file. If FALSE reads |
| * the whole file into memory and converts it. |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| * @return pointer to the newly opened UCHARBUF |
| */ |
| U_CAPI UCHARBUF* U_EXPORT2 |
| ucbuf_open(const char* fileName,const char** codepage,UBool showWarning, UBool buffered, UErrorCode* err); |
| |
| /** |
| * Gets a UTF-16 code unit at the current position from the converted buffer |
| * and increments the current position |
| * @param buf Pointer to UCHARBUF structure |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| */ |
| U_CAPI int32_t U_EXPORT2 |
| ucbuf_getc(UCHARBUF* buf,UErrorCode* err); |
| |
| /** |
| * Gets a UTF-32 code point at the current position from the converted buffer |
| * and increments the current position |
| * @param buf Pointer to UCHARBUF structure |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| */ |
| U_CAPI int32_t U_EXPORT2 |
| ucbuf_getc32(UCHARBUF* buf,UErrorCode* err); |
| |
| /** |
| * Gets a UTF-16 code unit at the current position from the converted buffer after |
| * unescaping and increments the current position. If the escape sequence is for UTF-32 |
| * code point (\\Uxxxxxxxx) then a UTF-32 codepoint is returned |
| * @param buf Pointer to UCHARBUF structure |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| */ |
| U_CAPI int32_t U_EXPORT2 |
| ucbuf_getcx32(UCHARBUF* buf,UErrorCode* err); |
| |
| /** |
| * Gets a pointer to the current position in the internal buffer and length of the line. |
| * It imperative to make a copy of the returned buffere before performing operations on it. |
| * @param buf Pointer to UCHARBUF structure |
| * @param len Output param to receive the len of the buffer returned till end of the line |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| * Error: U_TRUNCATED_CHAR_FOUND |
| * @return Pointer to the internal buffer, NULL if EOF |
| */ |
| U_CAPI const UChar* U_EXPORT2 |
| ucbuf_readline(UCHARBUF* buf,int32_t* len, UErrorCode* err); |
| |
| |
| /** |
| * Resets the buffers and the underlying file stream. |
| * @param buf Pointer to UCHARBUF structure |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| */ |
| U_CAPI void U_EXPORT2 |
| ucbuf_rewind(UCHARBUF* buf,UErrorCode* err); |
| |
| /** |
| * Returns a pointer to the internal converted buffer |
| * @param buf Pointer to UCHARBUF structure |
| * @param len Pointer to int32_t to receive the lenth of buffer |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| * @return Pointer to internal UChar buffer |
| */ |
| U_CAPI const UChar* U_EXPORT2 |
| ucbuf_getBuffer(UCHARBUF* buf,int32_t* len,UErrorCode* err); |
| |
| /** |
| * Closes the UCHARBUF structure members and cleans up the malloc'ed memory |
| * @param buf Pointer to UCHARBUF structure |
| */ |
| U_CAPI void U_EXPORT2 |
| ucbuf_close(UCHARBUF* buf); |
| |
| #if U_SHOW_CPLUSPLUS_API |
| |
| U_NAMESPACE_BEGIN |
| |
| U_DEFINE_LOCAL_OPEN_POINTER(LocalUCHARBUFPointer, UCHARBUF, ucbuf_close); |
| |
| U_NAMESPACE_END |
| |
| #endif |
| |
| /** |
| * Rewinds the buffer by one codepoint. Does not rewind over escaped characters. |
| */ |
| U_CAPI void U_EXPORT2 |
| ucbuf_ungetc(int32_t ungetChar,UCHARBUF* buf); |
| |
| |
| /** |
| * Autodetects the encoding of the file stream. Only Unicode charsets are autodectected. |
| * Some Unicode charsets are stateful and need byte identifiers to be converted also to bring |
| * the converter to correct state for converting the rest of the stream. So the UConverter parameter |
| * is necessary. |
| * If the charset was autodetected, the caller must close both the input FileStream |
| * and the converter. |
| * |
| * @param fileName The file name to be opened and encoding autodected |
| * @param conv Output param to receive the opened converter if autodetected; NULL otherwise. |
| * @param cp Output param to receive the detected encoding |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| * @return The input FileStream if its charset was autodetected; NULL otherwise. |
| */ |
| U_CAPI FileStream * U_EXPORT2 |
| ucbuf_autodetect(const char* fileName, const char** cp,UConverter** conv, |
| int32_t* signatureLength, UErrorCode* status); |
| |
| /** |
| * Autodetects the encoding of the file stream. Only Unicode charsets are autodectected. |
| * Some Unicode charsets are stateful and need byte identifiers to be converted also to bring |
| * the converter to correct state for converting the rest of the stream. So the UConverter parameter |
| * is necessary. |
| * If the charset was autodetected, the caller must close the converter. |
| * |
| * @param fileStream The file stream whose encoding is to be detected |
| * @param conv Output param to receive the opened converter if autodetected; NULL otherwise. |
| * @param cp Output param to receive the detected encoding |
| * @param err is a pointer to a valid <code>UErrorCode</code> value. If this value |
| * indicates a failure on entry, the function will immediately return. |
| * On exit the value will indicate the success of the operation. |
| * @return Boolean whether the Unicode charset was autodetected. |
| */ |
| |
| U_CAPI UBool U_EXPORT2 |
| ucbuf_autodetect_fs(FileStream* in, const char** cp, UConverter** conv, int32_t* signatureLength, UErrorCode* status); |
| |
| /** |
| * Returns the approximate size in UChars required for converting the file to UChars |
| */ |
| U_CAPI int32_t U_EXPORT2 |
| ucbuf_size(UCHARBUF* buf); |
| |
| U_CAPI const char* U_EXPORT2 |
| ucbuf_resolveFileName(const char* inputDir, const char* fileName, char* target, int32_t* len, UErrorCode* status); |
| |
| #endif |
| #endif |
| |
